More efficient technique for multiple activities on one site - same practicepaper.swf and practicepaper.js can be used

Generator improvements - prevents you entering more than 25 questions by fading the forward arrow out - previously you just found out by trial and error

Background details:

Until recently some users reported that it kept crashing when generating a file - this issue has now been fixed with a change to the code. This version is now fully usable and should work without any issues. There are a couple of final tweaks to make before this becomes the official release version.

Previous issue (now fixed):

I keep encountering crashes when I generate a file and then quit the program. Yet when I've given others access to the program they haven't encountered any issues at all. It is most puzzling - especially as I've tested it on multiple platforms (Windows XP, Vista, 7 - and a virtualised Mac version) and I still encounter the crash.